Impact of rheology modifiers on Bag-on-valve spray products
The effects of rheology modifiers on the stability and spraying performance of Bag-on-valve spray products were studied.Five rheology modifiers that were commonly used in cosmetics(carbomer,ammonium acryloyldimethyltaurate/VP copolymer,polyacrylate crosspolymer-6,xanthan gum,and cellulose)were studied either alone in water or in a lotion base at different concentrations(0.02％,0.05％,0.10％,and 0.20％).The rheological behavior was investigated with a rheometer.The spraying performance was tested on Malven Panalytic Spraytec.The micro-gel size distribution in water was measured on a laser granulometer.The stability of the lotions containing different rheology modifiers was also monitored for 3 months.The results showed that xanthan gum showed bad spraying performance and provided relatively high normal stress.Cellulose had relatively low normal stress and good spraying performance.Carbomer,acryloyldimethyltaurate/VP copolymer,and polyacrylate crosspolymer-6 had relatively small micro-gel size,which proposed a concentration-dependent rheological response.When used at high concentration,the molecules interacted with each other so that higher viscosity was build up.Good elasticity could also be obtained at high concentration.When used at low concentration,the micro-particles were incompact,especially for cellulose and ammonium acryloyldimethyltaurate/VP copolymer,the spraying performance was good,but the rheological behavior was viscous-like,indicative of bad stability.
万方数据
维普
